Be aware of Bossa Someone's milkshakes

Went to Bossa soneike met up with my friends for a drink , got there and my friends were already having a drink but my one friend who is a diabetic had a chocolate milkshake, she vomited and her stomach was also a messed up after having their milkshakes, she wanted to go home immediately and we didn't think much of it. We just thought she caught some bug. I then ordered the chocolate milkshake and it upset my tummy too. A few minutes later I went to the bathroom and vomited. I called the manager explained what happened and she said she would investigate. She also stated that she would have to see if anyone else complained but we got the last of the ice cream they ordered that day so how could she look into it..?? Please beware of Boss's milkshakes.